from django.shortcuts import render,get_object_or_404
from django.core.paginator import Paginator
from django.conf import settings
from django.db.models import Count
from django.contrib.contenttypes.models import ContentType
from .models import Blog,Blog_Type
from read_statistics.utils import read_statistics_once_read
from comment.models import Comment
from comment.forms import CommentForm
# Create your views here.
def get_blog_common_data(request,blogs_all_list):
    paginator = Paginator(blogs_all_list,settings.EACH_PAGE_BLOGS_NUMBER)#每3篇分页
    page_num = request.GET.get('page',1)#获取页码参数（GET请求）
    page_of_blogs = paginator.get_page(page_num)
    current_page_num = page_of_blogs.number #获取当前页码
    page_range = list(range(max(current_page_num-2,1),current_page_num))+list(range(current_page_num,min(current_page_num+2,paginator.num_pages)+1))
      #加上省略页码标记
    if page_range[0] - 1>=2:
        page_range.insert(0,'...')
    if paginator.num_pages - page_range[-1] >=2:
        page_range.append('...')
      #  #加上首页和尾页
    if page_range[0] != 1:
        page_range.insert(0,1)
    if page_range[-1] != paginator.num_pages:
        page_range.append(paginator.num_pages)
 
 #获取博客分类的对应的博客数量
    '''
    blog_types = Blog_Type.objects.all()
    blog_types_list =[]
    for blog_type in blog_types:
        blog_type.blog_count = Blog.objects.filter(blog_type=blog_type).count()
        blog_types_list.append(blog_type)
    '''
    #获取日期归档对应的博客数量
    blog_dates=Blog.objects.dates('created_time','month',order='DESC')
    blog_dates_dict = {}
    for blog_date in blog_dates:
        blog_count = Blog.objects.filter(created_time__year=blog_date.year,created_time__month=blog_date.month).count()
        blog_dates_dict[blog_date] = blog_count

    context = {}
    context['blogs'] = page_of_blogs.object_list#博客列表
    context['page_of_blogs'] = page_of_blogs#博客页码
    context['page_range']= page_range #博客范围
    context['blog_types'] = Blog_Type.objects.annotate(blog_count=Count('blog'))#博客类型
    context['blog_dates'] = blog_dates_dict#博客日期

    return context


def blog_list(request):
    blogs_all_list = Blog.objects.all()
    context = get_blog_common_data(request,blogs_all_list)
    return render(request,'blog/blog_list.html',context)

def blog_detail(request,blog_pk):
    blog = get_object_or_404(Blog,pk=blog_pk)
    read_cookie_key = read_statistics_once_read(request,blog)
    blog_content_type = ContentType.objects.get_for_model(blog)
    comments = Comment.objects.filter(content_type = blog_content_type,object_id = blog.pk)

    context = {}                   
    context['previous_blog'] = Blog.objects.filter(created_time__gt=blog.created_time).last()
    context['next_blog'] = Blog.objects.filter(created_time__lt=blog.created_time).first()
    context['blog'] = blog 
    context['comments'] = comments
    context['comment_form'] = CommentForm(initial={'content_type':blog_content_type.model,'object_id':blog_pk})
    response = render(request,'blog/blog_detail.html',context)#响应
    response.set_cookie(read_cookie_key,'true')#阅读标记
    return response

def blogs_with_type(request,blog_type_pk):

    blog_type = get_object_or_404(Blog_Type,pk=blog_type_pk)
    blogs_all_list = Blog.objects.filter(blog_type=blog_type)
   
    context = get_blog_common_data(request,blogs_all_list)
    context['blog_type']=blog_type  #博客类型的名称  
    return render(request,'blog/blogs_with_type.html',context)

def blogs_with_date(request,year,month):
    blogs_all_list = Blog.objects.filter(created_time__year=year,created_time__month=month)
    context = get_blog_common_data(request,blogs_all_list)
    context['blogs_with_date'] = '%s年%s月' %(year,month)
    return render(request,'blog/blogs_with_date.html',context)